Over the years the industry has increased bus bandwidth from PATA through SATA 1.5 Gb/s and SATA 3 Gb/s to keep up with the demand for higher transfer rates. The next evolution of bus bandwidth has now been achieved with the introduction of SATA 6 Gb/s, (SATA 3.0). We''ve added a SATA 6 Gb/s interface to our award-winning WD Caviar Blue, Green, and Black desktop hard drives in capacities from 250 GB - 3 TB. This transition to a SATA 6 Gb/s interface aligns with the introduction of SATA 6 Gb/s-supporting chip sets and motherboards coming to the market.

Massive capacity.
WD leads the way; pioneering capacity to deliver a massive 3 TBs of storage on a single drive.

Reduced power consumption.
Reduced power consumption makes it possible to build systems with higher capacities and the right balance of system performance, ensured reliability, and energy conservation.

I thought mwave alone means instant neg much like Dick Smith and Megabuy but yeah like others have said, you're better off spending a little bit more to buy a larger drive as the $ per Gb will be lower again.

Not a fan of the WD green drives I had 3 1TB drives all die pretty much spot on 24months ..luckily I had that data migrated onto my NAS and I don't need to have big platters in my PC now .. but I would not go for this class of drive again. The two 320GB drives I have left in my case are pushing 10+ years old and are going fine.